.fade-enter, .fade-appear{
  opacity: 0;
} 
.fade-enter-active, .fade-appear-active {
  opacity: 1;
  transition: opacity 1s ease-in;
}
.fade-enter-done {
  opacity: 1;
  color: red;
}
.fade-exit {
  opacity: 1;
} 
.fade-exit-active {
  opacity: 0;
  transition: opacity 1s ease-in;
}
.fade-exit-done {
  opacity: 0;
}


/*.show {
  animation: show-item 2s ease-in forwards;
}*/
/*forwards保存动画最后一帧的效果*/
/*.hide {
  animation: hide-item 2s ease-in forwards;
}

@keyframes show-item {
  0% {
    opacity: 0;
    color: red;
  }
  50% {
    opacity: 0.5;
    color: green;
  }
  100% {
    opacity: 1;
    color: blue
  }
}
@keyframes hide-item {
  0% {
    opacity: 1;
    color: red;
  }
  50% {
    opacity: 0.5;
    color: green;
  }
  100% {
    opacity: 0;
    color: blue
  }
}*/

/*


*/